diff --git a/lib/util.py b/lib/util.py
index f41d4f2..3feab9d 100644
--- a/lib/util.py
+++ b/lib/util.py
@@ -37,6 +37,14 @@ class cachedproperty(object):
         return value
 
 
+def formatted_time(t):
+    '''Return a number of seconds as a string in days, hours, mins and
+    secs.'''
+    t = int(t)
+    return '{:d}d {:02d}h {:02d}m {:02d}s'.format(
+        t // 86400, (t % 86400) // 3600, (t % 3600) // 60, t % 60)
+
+
 def deep_getsizeof(obj):
     """Find the memory footprint of a Python object.
 
diff --git a/server/block_processor.py b/server/block_processor.py
index 55a28f0..d9fd11f 100644
--- a/server/block_processor.py
+++ b/server/block_processor.py
@@ -21,7 +21,7 @@ from functools import partial
 from server.daemon import Daemon, DaemonError
 from server.version import VERSION
 from lib.hash import hash_to_str
-from lib.util import chunks, LoggedClass
+from lib.util import chunks, formatted_time, LoggedClass
 import server.db
 from server.storage import open_db
 
@@ -30,14 +30,6 @@ HIST_ENTRIES_PER_KEY = 1024
 HIST_VALUE_BYTES = HIST_ENTRIES_PER_KEY * 4
 
 
-def formatted_time(t):
-    '''Return a number of seconds as a string in days, hours, mins and
-    secs.'''
-    t = int(t)
-    return '{:d}d {:02d}h {:02d}m {:02d}s'.format(
-        t // 86400, (t % 86400) // 3600, (t % 3600) // 60, t % 60)
-
-
 class ChainError(Exception):
     pass
 
diff --git a/server/db.py b/server/db.py
index c44b17c..c1b3ff9 100644
--- a/server/db.py
+++ b/server/db.py
@@ -15,7 +15,7 @@ from struct import pack, unpack
 from bisect import bisect_right
 from collections import namedtuple
 
-from lib.util import chunks, LoggedClass
+from lib.util import chunks, formatted_time, LoggedClass
 from lib.hash import double_sha256, hash_to_str
 from server.storage import open_db
 from server.version import VERSION